Brake Pedal Slowly Goes To Floor

[Rusty Axle]

The wife's 2011 Q5 has 45K on it.

I installed new rotors and pads all around.

I noticed that the brake pedal was pretty soft initially. And also, with constant pressure the pedal travels all the way to the floor in a span of about 10 seconds.

Don't drive it that much so can't say what it was like before the refresh.

Prior experience with American iron always lead to a new master cylinder when this happened.

Did I damage something with the rotor/pad refresh?

I used a caliper compressor and was pretty gentle with it.

Aside from that, nothing but unbolting and re-bolting calipers.

And painting them red with white Audi emblem.

[AudiTechS4]

how did you do the rear pads ?

[Rusty Axle]

VAG COM to retract parking brake. Caliper tool to compress the piston. Then the rest was simple swap out and re-install. Then close parking brake with VAG-COM.

[Qumag]

Worth a shot.... Did you try bleeding ABS module through VAG COM?

[Rusty Axle]

Thanks for the suggestion. Haven't done that - will investigate on the weekend.

[Rusty Axle]

Looks like the issue resolved itself. Drove the wife's Q today and firm pedal, no more slow sinking to the floor. The Akebonos are bedded, stopping well and no more black dust.